RU2802969C1 - Power transmission mechanism for ship propeller - Google Patents

Abstract

FIELD: marine engineering.

SUBSTANCE: invention is related to mechanisms for transmitting rotation for a marine propeller, to devices for transmitting rotational motion from an engine to a propeller.

EFFECT: ensuring maneuvering of the vessel due to rotation of the propellers, which is achieved by using a turntable with a circular gear, due to which the rotational movement from the rotation gear is transmitted to the propeller drive housing, which causes a circular displacement of the propellers.

1 cl, 3 dwg

Description

A separate marine propeller [CN217515360 (U) - 2022-09-30] is known from the prior art, which relates to the field of technology of ship power equipment, in particular to a free-standing propeller that contains a support plate, to the lower edge of one end of the support plate a bracket is attached, a positioning pipe is attached to the bottom. The middle surface of the support plate, and the inner threaded pipe is rotatably connected to the upper surface of the middle of the support plate. The end of the upper edge of the support plate closest to the inner threaded pipe is rotatably connected to the driven gear in mesh with the inner threaded pipe, the outer threaded pipe is rotatably inserted in a threaded connection with the inner threaded pipe, and the positioning pipe and the shaft rod are rotatably connected to the outer threaded pipe. . The motor drives the driven gear through a hex shaft, the drive gear in mesh gear with the driven gear drives an inner threaded pipe, the outer threaded pipe in a threaded connection with the inner threaded pipe drives multiple blades to move upward from the surface of the water through transfer case, and after the blades are cleared from the surface of the water, the blades are driven into rotation by the engine. And the user can conveniently remove aquatic plants or debris wrapped around the oars next to the boat. The disadvantage of this analogue is the impossibility of turning the axis of rotation of the propellers.

Also known from the prior art is a Direct bevel gear for a boat with an outboard engine with an electronic propulsion [KR20200084580 (A) - 2020-07-13], which refers to a direct bevel gearbox for an outboard electric motor, including: a drive shaft that is installed in the middle part of the outboard a small boat electric motor for transmitting power to a brushless DC motor; a drive gear connected to an end of the drive shaft; a bevel gear located at right angles to the drive shaft and meshed; and a propeller shaft, in which one end is connected to a bevel gear and the other end is connected to a propeller. Each of the pinion gear and bevel gear has a straight bevel, thereby preventing the pinion gear and bevel gear from moving when rotating forward or reverse through the engine. The disadvantage of this analogue is also the impossibility of turning the axis of rotation of the propellers.

The closest in technical essence is the Motorboat Drive System with multiple transmissions [US 2006089062 (A1) - 04/27/2006], which provides a drive system that includes an engine having a drive shaft connected to a pair of propeller shafts. The drive system includes a primary gearbox and opposed external gearboxes. The primary gearbox includes a housing and a gear train connected to the engine shaft, and the outer gearboxes, connected to the primary gearbox by a transverse shaft, contain a housing and a gear train connected to corresponding propeller shafts. A cooling system is provided, including a cooling pad for each gearbox. Each overhead gearbox is provided with a support system consisting of a cradle connected to support points on the housing. The motor includes an adapter plate attached to the primary gearbox for moving the primary gearbox with the motor. The modified drive system uses only one outboard gearbox in combination with one motor. Another modified drive system uses a single engine and propeller coupled with a transmission having a power take-off shaft.

The main technical disadvantage of the analogues and the prototype is the inability to rotate the axis of rotation of the propellers to ensure maneuvering of the vessel.

The technical result of the invention is to ensure maneuvering of the vessel by turning the propellers.

The declared technical result is achieved due to the fact that the rotary table is round in shape with a hole in the center, placed horizontally, on the upper side of which a circular gear is mounted along the perimeter, the transmission teeth of which are aligned with the teeth of the table rotation gear; on the lower side of the rotary table, a sliding bearing is rigidly mounted , ensuring with its lower side sliding along the inner surface of the ship's hull, the central hole of the turntable coincides in diameter and is aligned with the holes in the sliding bearing and the ship's hull, the turntable is connected through a sliding key to the housing of the propeller shaft, through which the propeller drive shaft passes, while The screw shaft housing is additionally fixed on the turntable using a clamping nut, the screw drive shaft is connected through the screw drive gears with the screw drive shafts on which the screws are mounted, the screw shaft housing is rigidly mounted with the screw drive housing in which the screw drive gears are mounted. screw shafts on which rolling bearings are mounted to reduce friction, a propeller drive housing with screws are mounted inside the propeller housing, in the center of the lower inner side of which a stiffening shaft cup is installed, a plain bearing is mounted between the propeller housing and the ship's hull, and a cylindrical one is made in the center of the stiffening shaft sleeve a groove into which a stiffening shaft is inserted, abutting a counter cylindrical groove made in the center of the lower outer side of the screw drive housing; holes are made in the screw housing to ensure the flow of water.

Brief description of the drawings.

Figure 1 shows a diagram of the transmission of rotational motion of the shaft to a rotatable propeller.

In fig. 2 and 3 show options for placing the propeller housing on the bottom of the vessel.

The figures indicate:

1 - rotary table, 2 - circular gear, 3 - table rotation gear, 4 - plain bearing, 5 - ship body, 6 - sliding key, 7 - screw shaft housing, 8 - screw drive shaft, 9 - pressure nut, 10 - screw drive gear, 11 - screw drive shafts, 12 - screws, 13 - screw drive housing, 14 - rolling bearing, 15 - screw housing, 16 - stiffening shaft cup, 17 - stiffening shaft, 18 - holes in the screw housing.

Carrying out the invention

The invention is implemented through the use of a rotary table 1 of a round shape with a hole in the center, placed horizontally, on the upper side of which a circular gear 2 is mounted along the perimeter, the transmission teeth of which are aligned with the teeth of the table rotation gear 3. A sliding bearing is rigidly mounted on the lower side of the rotary table 1 4, ensuring with its lower side sliding along the inner surface of the vessel hull 5. Accordingly, the central hole of the turntable 1 in diameter coincides and is aligned with the holes in the sliding bearing 4 and the vessel hull 5. The turntable 1 is connected through a sliding key 6 to the housing of the screw shaft 7 , through which the screw drive shaft 8 passes. In this case, the screw shaft housing 7 is additionally fixed on the turntable 1 using a clamping nut 9. The screw drive shaft 8, through the screw drive gears 10, is connected to the screw drive shafts 11, on which the screws 12 are mounted. Housing The screw shaft 7 is rigidly mounted with the screw drive housing 13, in which the screw drive gears 10 are mounted, the screw drive shafts 11, on which rolling bearings 14 are mounted to reduce friction. The screw drive housing 13 with screws 12 are mounted inside the screw housing 15, in the center of the lower inner side of which a stiffening shaft cup 16 is installed. Between the screw housing 15 and the ship hull 5, a sliding bearing 4 is mounted. In the center of the stiffening shaft sleeve 16 there is a cylindrical groove into which a stiffening shaft 17 is inserted, resting against a reciprocal cylindrical groove made in the center of the lower outer side of the screw drive housing 13. Holes 18 are made in the screw housing 15 to ensure the flow of water.

The invention is used as follows

Rotational motion is supplied through the table rotation gear 3, which is transmitted through the circular gear 2 to the rotary table 1. In this case, the rotary table 1 will begin to rotate. In this case, the rotational movement will also begin to be carried out by the propeller shaft housing 7 and the propeller drive housing 13, on which the propellers 12 are mounted. This creates a thrust vector that ensures the rotation of the vessel, which allows the vessel to be controlled using only propellers.

The technical result - ensuring maneuvering of the vessel by turning the propellers - is achieved through the use of a rotary table 1 with a circular gear 2, due to which the rotational motion from the rotation gear 3 is transmitted to the propeller drive housing 13, which causes a circular displacement of the propellers.

In 2022, the applicant implemented this technical solution in the form of a prototype. The use of the model confirmed the possibility of controlling a small vessel only by turning the propeller. At the same time, the possibility of ensuring side movement to the pier for mooring was confirmed.

Claims (1)

A rotation transmission mechanism for a ship propeller, characterized in that it contains a round-shaped rotary table with a hole in the center, placed horizontally, on the upper side of which a circular gear is mounted along the perimeter, the transmission teeth of which are aligned with the teeth of the table rotation gear, on the lower side of the rotary table a sliding bearing is rigidly mounted, ensuring sliding with its lower side along the inner surface of the ship's hull, the central hole of the turntable is the same in diameter and aligned with the holes in the slide bearing and the ship's hull, the turntable is connected through a sliding key to the housing of the screw shaft, through which the drive shaft passes screws, while the screw shaft housing is additionally fixed on the turntable using a clamping nut, the screw drive shaft is connected through the screw drive gears to the screw drive shafts on which the screws are mounted, the screw shaft housing is rigidly mounted to the screw drive housing in which the drive gears are mounted screws, screw drive shafts on which rolling bearings are mounted to reduce friction, a screw drive housing with screws is mounted inside the propeller housing, in the center of the lower inner side of which a stiffening shaft cup is installed, a plain bearing is mounted between the propeller housing and the ship hull, in the center of the shaft cup For rigidity, a cylindrical groove is made into which a stiffening shaft is inserted, abutting against a counter cylindrical groove made in the center of the lower outer side of the screw drive housing; holes are made in the screw housing to ensure the flow of water.